Keyphrases
- clef ip
- information retrieval
- ir evaluation
- retrieval effectiveness
- patent retrieval
- intellectual property
- ad hoc retrieval
- test collection
- prior art
- question answering
- retrieval model
- relevance assessments
- information retrieval systems
- document rankings
- relevance feedback
- query expansion
- relevance judgements
- query performance prediction
- trec test collections
- search engine
- document retrieval
- relevant documents
- trec collections
- language modeling
- digital libraries
- ad hoc information retrieval
- natural language